Annotated image
The first image shows multiple features of hyperparathyroidism including giant cell tumors of the iliac bones, osteomalacia of the examined bones, stress fractures of the inferior pubic rami, bilateral erosive changes of the articular surfaces of both sacroiliac joints, subperiosteal resorption of the medial aspect of the left femoral neck and erosive changes of the medial sternal heads.
The second image shows an ectopic parathyroid tissue at the suprasternal region on CT and MRI.